(1)10的m+1次方*10的2m-1次方*10的2-m次方=10^(m+1+2m-1+2-m)=10^2(m+1)
(2)y的n-1次方·y·y的n+2次方 =y^(n-1+1+n+2)=y^2(n+1)
(3)(x-y)的3次方·(y-x)²=(x-y)^(3+2)=(x-y)^5
(4)(x-y)的3次方·(y-x)= - (x-y)^(3+1)= - (x-y)^4
(1)10的m+1次方*10的2m-1次方*10的2-m次方=10^(m+1+2m-1+2-m)=10^2(m+1)
(2)y的n-1次方·y·y的n+2次方 =y^(n-1+1+n+2)=y^2(n+1)
(3)(x-y)的3次方·(y-x)²=(x-y)^(3+2)=(x-y)^5
(4)(x-y)的3次方·(y-x)= - (x-y)^(3+1)= - (x-y)^4